diff --git a/index.js b/index.js
index c01e9e2..a1b4874 100644
--- a/index.js
+++ b/index.js
@@ -252,9 +252,10 @@ async function authentificate(){
 	})
 	if(this.options.verbose) console.info("Got challenge:", challenge?.result?.challenge || challenge?.msg || challenge)
 	if(!challenge.success) return challenge
+	if(!challenge?.result?.challenge) return { success: false, msg: `No challenge was given for an unknown reason: ${challenge?.msg || challenge?.message || challenge?.result?.msg || challenge?.result?.message || challenge?.status_code}`, challenge }
 
 	// Déterminer le mot de passe
-	var password = createHmac("sha1", this.options.appToken).update(challenge.result.challenge).digest("hex")
+	var password = createHmac("sha1", this.options.appToken).update(challenge?.result?.challenge).digest("hex")
 	if(this.options.verbose) console.info("Password for challenge:", password)
 
 	// On s'authentifie
diff --git a/package.json b/package.json
index f7f45b8..2750ba3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "freebox-wrapper",
-	"version": "1.0.2",
+	"version": "1.0.3",
 	"description": "Un wrapper pour l'API de Freebox OS, gère la connexion et facilite les requêtes.",
 	"main": "index.js",
 	"keywords": [